Merge branch 'test/weekday-streak-simulation' of https://github.com/AryanRajuBankar3000/commitpulse into test/weekday-streak-simulation

Author: AryanRajuBankar3000

app/api/streak/route.ts

@@ -106,6 +106,8 @@ export async function GET(request: Request) {
       : year
         ? `${year}-12-31T23:59:59Z`
         : undefined;
+    const currentYear = new Date().getUTCFullYear();
+    const isHistoricalYear = !!year && Number(year) < currentYear;
 
     let timezone = 'UTC';
     if (tzParam) {
@@ -224,7 +226,9 @@ export async function GET(request: Request) {
       : getSecondsUntilUTCMidnight();
     const cacheControl = refresh
       ? 'no-cache, no-store, must-revalidate'
-      : `public, s-maxage=${secondsToMidnight}, stale-while-revalidate=86400`;
+      : isHistoricalYear
+        ? 'public, s-maxage=31536000, immutable'
+        : `public, s-maxage=${secondsToMidnight}, stale-while-revalidate=86400`;
 
     return new NextResponse(svg, {
       headers: {